Friction element for brakes



Aug. 19, 1947, J G. OETZEL 4 5 FRICTION ELEMENT FOR BRAKES Original Filed Dec; '7. 1944 INVENTOR Jahn Geo/: 6 Oeje/ ATTORNEYS.

Patented Aug. 19, 1947 UNITED STATES PATENT OFFICE FRICTION ELEMENT FOR BRAKES John George Oetzel, Beloit, Wis., assignor to Warner Electric Brake Manufacturing Company, South Beloit, 111., a corporation of Illinois Original application December 7, 1944, Serial No.

567,004. Divided and this application September 20, 1945, Serial No. 617,597

4 Claims. (Cl. 188-250) ,1 2 This invention relates to a friction element for fectually brace the plate ll and, together with use in a brake of the internal expanding type, and the central rib 8, form an extremely rigid backthe general object is to provide a novel shoe coning for the end plate II. The shoe proper and struction which is simple and inexpensive to conits ends are thus formed entirely of sheet metal struct, which is extremely rigid, and which is 5 stampings, which may be assembled quickly and made of sheet metal stampings. secured together by welding to form a rigid A more detailed object is to provide a shoe end channeled structure. comprising a member abutting against the shoe This application is a division of my co-pending rib and having spaced wings extending along and pp o Serial filed December secured to the shoe proper. 10 1944.

The invention also resides in the novel con- I Claim as y invention: struction of the parts which facilitates welding 1. A brake shoe comp tW C an els With wide and narrow parallel right angular flanges along opposite side edges, said channels being disposed side by side with the wide flanges abutting each other and secured together, out-turned description taken in connection with the accomright angular flanges at e ends of Sa d W d panying drawings, in which flanges, and a U-shaped plate having a fiat Figure 1 is a. side iew of a friction h intermediate section abutting against and sebodying the novel features of the present inven- Cured to said Out-turned flanges and tWO p tion, part of the shoe being shown in section. 6 Wings extending along sa d hannel and Fig. 2 is a perspective view of one of th h disposed adjacent and secured to said narrow ends. flanges.

While the invention is susceptible of various A brake shoe comprising tWO m a t ps modifications and alternative constructions, I 5 having right angular flanges along ne Sid edge have shown in the drawings and will herein dedisposed adjacent each Other d Sed red t0- scribe in detail the preferred embodiment. It is s r rm a n l n d flan to be understood, however, that I do not intend at th nds f sa fla a a -s p d plat to limit the invention by such disclosure, but aim having a flat intermediate section abutting to cover all modifications and alternative conagainst and secured to said- 0 -t n flan s of the same together to form a rigid truss structure at the end of the friction element.

Other objects and advantages of the invention will become apparent from the following detailed structions falling within the spirit and scope of n w p l Wi e n n l n th the invention as expressed in the appended remote margi s o said strips and rigidly claims. cured thereto.

3. A brake shoe comprising two metal strips disposed side by side and having flanges along adjacent sides secured together to form a central rib, and a U-shaped plate having an intermediate section abutting against the end of said rib and two parallel wings extending along the outer margins of said strips and secured thereto.

4. A brake shoe comprising two metal strips The backing 5 comprises two sheet metal chandisposed e by s de and having flanges along 1181s 1 having wide and narrow flanges 3 and 9 adjacent sides secured together to form a cena10ng Opposite side, margains These channels tral rib, a plate extending transversely across are disposed side by side with their wider flanges the end of Said Tih 1h abutment with h h 8 abutting each other and spot welded together members laterally Spaced from sald rlb to form a centra1 reinforcing rib for imparting opposite Sides thereof and extending along and rigidity to the Shoe backing 5 secured to the outer side margins of said strips,

The ends 3 of the fl g 3 are turned one end of each of said members being rigidly wardly at right angles and abut against and are fz z to the corresponding Outer end of sai p a e.

The invention is shown in the drawings incorporated in a friction element or shoe comprising 35 a flexible sheet metal backing 5 having segments 6 of friction material arranged in end to end relation and secured as by riveting to one side of the backing. The element is curved according to the internal contour of the drum in which the 40 element is to be used.

welded to a T-shaped plate ll whose crosspiece is also welded to the bottoms of the channels 1. JOHN GEORGE OETZEL- The outer surface of the plate is disposed radially relative to the friction surface of the shoe seg- REFERENCES CITED ment 6. The following references are of record in the The outer end portions of the T-plate are file of this patent:

tapered and bent at right angles to form wings I2 which are spaced to lie adjacent the inner l UNITED STATES PATENTS sides of the narrow channel flanges 9 to which Number Name Date they are secured by Welding. These wings ef- 1,781, 91 Kohr Nov. 18, 1930 

